CBQE-989:  ensure (get) resonses are dict

similar to http://review.couchbase.org/#/c/24141/
for get requests: "seeing lots of the following errors in the console
due to attempts to subscript int's longs
which are opaque values being returned and
not real error mesages...

Change-Id: Ib109e5db9d9717019745da1557c3b6324c15a66c
Reviewed-on: http://review.couchbase.org/24331
Tested-by: buildbot <build@couchbase.com>
Reviewed-by: Tommie McAfee <tommie@couchbase.com>